quaternized pine sawdust in the treatment of mining wastewater

marina v frontasyeva joint institute for nuclear research dubna moscow region russian federation view further author a series of column cycles imitating a real treatment process was conducted three sorption/desorption cycles a maintenance cycle with hcl and two sorption/desorption cycles the effects of

vanadium removal and recovery from bauxite residue leachates by

this work aims to test the efficiency of ion exchange resins for vanadium v removal and recovery from bauxite residue leachates at alkaline ph 11 5 and 13 in column tests breakthrough was reached at 70 bed volumes with the red mud leachate at ph 13 while no breakthrough was achieved with the effluent at ph

vanadium removal and recovery from bauxite residue leachates by

sep 1 the largest producers are china russia and south africa usgs vanadium is mostly used in ferrous and non-ferrous alloys vanadium concentrations were tested in batch tests experiments with columns allowed assessing breakthrough in removal and the feasibility of recovering vanadium

vanadium global bio geochemistry

sep 28 deposits in nigeria russia venezuela and south africa akinlua et al lopez et al ogunlaja et al yasnygina et al vanadium in coal is generally considered a trace element due to concentrations that are typically less than mg kg1 sia and abdullah coal may

gas absorption accompanied by an irreversible reaction of general

article gas absorption accompanied by an irreversible reaction of general order authors p l t brian close author notes massachusetts institute of technology cambridge massachusetts search for more papers by this author first published january full publication history doi 10 /aic

high-performance recovery of vanadium v in leaching/aqueous

feb 3 efficient extraction and stripping for recovering vanadium v from the leaching/aqueous solution of chromium-bearing vanadium slag vcr slag are essential to high purity of metalorganic compound was difficult to obtain by common separation methods e g recrystallization column separation and

study of co2 absorption and desorption in a packed column

carbon dioxide a major greenhouse gas may need to be removed from flue gas produced by combustion of fossil fuels in order to manage future climate changes although conventional wet scrubbing techniques exist for removal of carbon dioxide from gas streams the wet scrubbing techniques must improve to process

infcirc//add 1 - protocol between the russian federation and

jan 8 notification that the procedures of the russian federation required for entry into force had been met columns or extraction equipment means those items as described in entries 5 6 1 5 6 2 5 6 3 5 6 5 5 6 6 adsorption/desorption on a special very fast-acting ion-exchange resin or adsorbent a

resins in uranium extractive metallurgy - purolite

uranium has been recovered via ion exchange resins since the 's the worldwide demand for alternative energy sources has resulted in a renewed interest in the uranium industry purolite has been supplying ion exchange resins for uranium recovery for many years and has accumulated much experience in the

is there any method to simulate gas stripping column in aspen

resins in uranium extractive metallurgy - purolite

uranium has been recovered via ion exchange resins since the 's the worldwide demand for alternative energy sources has resulted in a renewed interest in the uranium industry purolite has been supplying ion exchange resins for uranium recovery for many years and has accumulated much experience in the

ion exchange recovery of chromium vi and manganese ii from

jun 3 for example manganese is used in production of electrochemical manganese and pure vanadium salts zhang and cheng and chromium is applied in various the concentrations of mn ii and cr vi in solutions after sorption were determined by flame aas method model saturn-2 russia

column-commentary a tale of a tanker russian gas sanctions

jan 24 after months of president donald trump'spromises to bring about a new era of american energydominance largely based on booming oil and natural gasproduction it was surprising to learn that the united stateswill continue importing liquefied natural gas this winter evenmore surprising that the

infcirc//add 1 - protocol between the russian federation and

jan 8 notification that the procedures of the russian federation required for entry into force had been met columns or extraction equipment means those items as described in entries 5 6 1 5 6 2 5 6 3 5 6 5 5 6 6 adsorption/desorption on a special very fast-acting ion-exchange resin or adsorbent a

role of singlet oxygen in the oxidation of toluene on vanadium

2institute for petroleum and gas problems siberian branch of the russian academy of sciences ul oktyabrskaya 1 yakutsk it was demonstrated that the oxidation of toluene on individual vanadium and molybdenum oxides follows independent illary column 50 m with the ffap phase gas- eous products were

optimization of flooding in an absorption - theseus

pages 66 + appendices 4 supervisor staffan borg in absorption-desorption packed columns if any or certain combinations of liquid or gas flow in combination with the reboiler heat pressure and stripper feed power is too high the column becomes flooded with the liquid flooding is accompanied by a dramatic increase

role of singlet oxygen in the oxidation of toluene on vanadium

2institute for petroleum and gas problems siberian branch of the russian academy of sciences ul oktyabrskaya 1 yakutsk it was demonstrated that the oxidation of toluene on individual vanadium and molybdenum oxides follows independent illary column 50 m with the ffap phase gas- eous products were

adsorption absorption and desorption what's the difference

aug 24 adsorption and desorption in chromatography adsorption and desorption are the main processes operating in chromatography it is the relative rates of adsorption and desorption onto and off the stationary phase that allows chemicals in samples to be separated if the column conditions favour adsorption